Fuel Pressure: Testing and Inspection

FUEL PRESSURE INSPECTION

(a) Check the battery positive voltage is above 12 V.
(b) Disconnect the negative (-) terminal cable from the battery.
(c) Remove the 6 bolts, and disconnect the No.2 timing belt cover.





(d) Remove the union bolt holding the fuel pipe to the delivery pipe and gasket.

CAUTION:
- Put a shop towel under the delivery pipe.
- Slowly loosen the union bolt.





(e) Install SST (pressure gauge) to the delivery pipe with the 2 gaskets and SST (union and union bolt). SST O9268-45012

Torque: 34.3 N.m (350 kgf.cm, 25 ft.lbf)

(f) Wipe off any splattered gasoline.
(g) Connect the TOYOTA hand-held tester to the DLC3.
(h) Reconnect the negative (-) terminal cable to the battery.
(i) Turn the ignition switch ON.
(j) Measure the fuel pressure.

Fuel pressure: 265 - 304 kPa
(2.7 - 3.1 kgf/sq. cm, 38 - 44 psi)

If pressure is high, replace the fuel pressure regulator.
If pressure is low, check these parts:
- Fuel hoses and connections
- Fuel pump
- Fuel filter
- Fuel pressure regulator
- VSV for fuel pressure control
(K) Disconnect the TOYOTA hand-held tester from the DLC3.
(I) Reinstall the No.2 timing belt cover with the 6 bolts.

Torque: 9 N.m (90 kgf.cm, 80 in.lbf)

(m) Start the engine.





(n) Disconnect the vacuum sensing hose from the fuel pressure regulator, and plug the hose end.
(O) Measure the fuel pressure at idle.

Fuel pressure: 265 - 304 kPa
(2.7 - 3.1 kgf/sq. cm 38 - 44 psi)

(p) Reconnect the vacuum sensing hose to the fuel pressure regulator.
(q) Measure the fuel pressure at idle.

Fuel pressure: 226 - 265 kPa
(2.3 - 2.7 kgf/sq. cm, 33 - 38 psi)

If pressure is not as specified, check the vacuum sensing hose and fuel pressure regulator.
(r) Stop the engine.
(s) Check that the fuel pressure remains as specified for 5 minutes after the engine has stopped.

Fuel pressure: 147 kPa (1.5 kgf/sq. cm, 21 psi) or more

If pressure is not as specified, check the fuel pump, pressure regulator and/or injectors.
(t) After checking fuel pressure, disconnect the negative (-) terminal cable from the battery and carefully remove the SST to prevent gasoline from splashing. SST 09268-45O12
(u) Remove the other union bolt, 3 gaskets and fuel pipe from the delivery pipes.
(v) Reinstall the fuel pipe with 4 new gaskets and the 2 union bolts.

Torque: 34.3 N.m (350 kgf.cm, 25 ft.lbf)

(w) Reconnect the negative (-) terminal cable to the battery.
(x) Check for fuel leakage.